//Problem is in the GridView and the check box which is in the gridview //the flow of the program never goes into the if loop even if the check box is checked

<pre lang="HTML">

<div>
                    <asp:GridView ID="gdvReceivedLetter" runat="server" AllowPaging="True" AutoGenerateColumns="False"
                        CellPadding="3" DataKeyNames="ID" GridLines="Horizontal" EmptyDataText="No Records Found"
                        PageSize="10" Width="95%" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None"
                        Font-Names="Arial" Font-Size="10.5" BorderWidth="1px" OnSelectedIndexChanged="gdvReceivedLetter_SelectedIndexChanged"
                        OnPageIndexChanging="gdvReceivedLetter_PageIndexChanging">
                        
                        <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
                        <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
                        <Columns>
                            <asp:BoundField DataField="ID" HeaderText="ID" Visible="False"></asp:BoundField>
                            <asp:TemplateField Visible="true">
                                <HeaderTemplate>
                                    <input type="CheckBox" id="chkSelect" runat="server"  />
                                </HeaderTemplate>
                                <ItemTemplate>
                                    <asp:CheckBox runat="server" ID="chkDelete"  />   
                                </ItemTemplate>
                                <HeaderStyle Width="9px" />
                                <ItemStyle Width="9px" />
                            </asp:TemplateField>

            <asp:BoundField DataField="FileName" HeaderText="File Name">
                                <HeaderStyle CssClass="GridItemHeaderLarge" />
                                <ItemStyle CssClass="GridItemLarge" />
                            </asp:BoundField>                            

                        </Columns>
                        <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
                        <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
                        <HeaderStyle BackColor="#4A3C8C" ForeColor="#F7F7F7" />
                        <AlternatingRowStyle BackColor="#F7F7F7" />
                    </asp:GridView>
                </div>
    <table width="100%">
                    <tr>
                        <td width="80%">
                        </td>
                        <td width="20%" style="padding-removed 18px">
                            <asp:Button runat="server" ID="btnDelete" Text="Delete" Font-Bold="true" OnClientClick="return Delete();"
                                Enabled="true" OnClick="btnDelete_Click" />
                        </td>
                    </tr>
                </table>

<pre lang="c#"> foreach (GridViewRow chkrow in gdvReceivedLetter.Rows)
                {
                    CheckBox chk = (CheckBox)chkrow.FindControl("chkDelete");
                    if (chk != null && chk.Checked)
                    {
                        Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('CHECKEDDDDD');", true);   //////here is the PROBLEM
////exen the check box is checked the cursor never comes here!!! WHY!!????
                    }
                }